Originally Posted by tziger

Hi again,

i did a last test today and i have verified the problem.

Thanks to Stuart Mackay's idea (thanks) i have placed a bicycle pump at the tank vent.
First i removed the fuel filter just to be sure that it wasn't it the problem.
I followed the normal starting process and voila. The motor started easily.
Of course you can imagine, i was checking the revs, checking the temps, controlling the throttle and pumping at the same time air in the tank.
When i stopped pumping (and removed the pump) the engine quitted.
I run like this for about 5mins. No3 did not fire but at least the engine was running.
I even managed to go to full throttle with his method which before it was not possible.
After 5 minutes of running this way i got again the festo tube filled with black grease.
I cleaned it and i run it again. Easy to start.

After reading several hours all the thread from the start i realized that in post #1837 from Jim Catanach, he was describing the exact same problem. At the time someone advised him to do first a test with the festo tube long enough to put in the water and see if there is a pulse. He did that he saw no pulse and then he opened the "top" of the housing (i am not sure which housing with no photos) and realized that the small piston was dry. I do not think that in my case the piston is dry since it spits grease but certainly the piston is not functioning properly.
Out of curiosity how do i get to the piston? How do i remove the top of the pulse generator? Is it screwable or i have to remove the front end of the engine? (Which i will not do since the engine is still in warranty).

I conclude with a decision and a question.
I will send the engine back to airworld to be checked and i will buy a fuel pump even if they correct the issue because i have lost confidence in the reliability of this engine. Who tells me that it will run fine and on take off it will not stop? It is supposed to be run at the factory for 15 minutes.

The plane i will put it on is not for this kind of dilemma. This brings to my question. How people feel comfortable having dead sticks with several thousand of dollars on the air? What am i missing?
Jerry Bates Sparta Executive 1/4. 23Kg, Moki180 (i hope) more than 10.000 rivets installed, 5 years of work.
Thank you all,
Lawrence